Quadrature clock divider and an output clock generation method

By pressing the 4 / n calibration process (210, 310), followed by treatment with 4 other (120, 220) to process embodiment except n. By clock phase selection process, helps quadrature input clock by 4 / n calibration process. In addition to the terminal 4 by the introduction of process, easy to provide a quadrature output signal. In addition to the quadrature divider 3 by selecting each of the third clock phase quadrature is achieved by 4 / n scaling process, and a quadrature output in addition to providing control signals to implement this process 4 each of the third clock phase selection.